[IMP] mail: add documentation about the SSL SMTP authentication

[std-odoo]

Purpose

Add the documentation about the SSL SMTP authentication (2 new binary arguments) and also about the new from filter binary argument.

The goal of those new arguments is to improve the score of the emails sent by Odoo.

Task 2367946 See odoo/odoo/pull/61853 See odoo/upgrade/pull/1903

[AntoineVDV]

@std-odoo Converted to draft until that https://github.com/odoo/odoo/pull/61853 is merged ;)

[jcs-odoo]

Hello! Just checking if this can go forward.

[robodoo]

Sorry, I didn't know about this PR and had to retrieve its information, you may have to re-approve it.

[robodoo]

Pull request status dashboard.

[std-odoo]

@tiku-odoo I updated the rst :)

(sorry I didn't noticed it was my old branch, look like we already merged some doc about the SMTP config...)

[tiku-odoo]

@odoo/doc-review When you have a moment can you review this change?

[tiku-odoo]

@odoo/doc-review When you have a moment can you review this change?

[Feyensv]

@odoo/doc-review When you have a moment can you review this change?

When a PR is ready for review, just hit the "Ready for review" button and the responsible teams will be automatically pinged ;).

[std-odoo]

@tiku-odoo Hope it's last changes :)

[samueljlieber]

Hi @mivu-odoo 👋 I updated the document per your changes, ready for your review! Thanks :)

cc: @tiku-odoo

[samueljlieber]

Hi @StraubCreative, I made your suggestions to the document as well as created a task for the future cleanup #2978985 👍